|The spread of information in the blogosphere. First blog writes a post and then other blogs refer to it. The behavior (information) spreads (cascades) through the network of blogs.||We plot the mount of information captured vs. the number of blogs read. We compare our algorithm to current blog ranking techniques, like reading blogs with most in-links, most posts, most out-links or just reading random blogs. See the paper for details.|
Water distribution networksSame techniques and algorithms as used for blogs also apply to detecting disease outbreaks in water distribution networks. Consider a city water distribution network, delivering water to households via pipes and junctions. Intrusions can cause contaminants to spread over the network, and we want to select a few locations (pipe junctions) to install sensors, in order to detect these contaminations as quickly as possible.
The sensor placements obtained by our algorithm are provably near optimal, providing a constant fraction of the optimal solution. Our approach scales, achieving speedups and savings in storage of several orders of magnitude.
City water distribution network. Circles show the locations of placed sensors in order to detect water contaminations as quickly as possible.
Video of the seminar talk on
Cost-effective Outbreak Detection in Networks
by Jure Leskovec